F91

Conduct disorders

Header / non-billable

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · F91
Excludes 1

antisocial behavior (Z72.81-) antisocial personality disorder (F60.2)

Excludes 2

conduct problems associated with attention-deficit hyperactivity disorder (F90.-) mood [affective] disorders (F30-F39) pervasive developmental disorders (F84.-) schizophrenia (F20.-)

Inherited from F90-F98Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
Note

Codes within categories F90-F98 may be used regardless of the age of a patient. These disorders generally have onset within the childhood or adolescent years, but may continue throughout life or not be diagnosed until adulthood

Inherited from chapter 5Mental, Behavioral and Neurodevelopmental disorders
Includes

disorders of psychological development

Excludes 2

symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Official Guidelines for F91

FY 2026 ›